Hold down the power button while holding down the "volume down" button.

This will boot into your bootloader, where you can select "Apply Update.zip"

Follow on-screen instructions, and enjoy the official Gingerbread on your MyTouch 4G.

DISCLAIMER: Even upon successful install, you WILL lose your settings, apps, and possibly contacts (depending on how you have them stored). I am not responsible for your device if this does not work for you. Also, neither is the original file host. This is not my file, or website. I have had no contact with the original host. I took a shot in the dark, said "screw it" and tried the update. I did successfully update using this file.

This worked great and didn't take much time at all. Thanks a lot for the link. Everything seems to be running smoothly except I can't send picture messages. I seem to recall having this problem when I first got the phone but I don't remember what the fix was. Any suggestions?

This worked great and didn't take much time at all. Thanks a lot for the link. Everything seems to be running smoothly except I can't send picture messages. I seem to recall having this problem when I first got the phone but I don't remember what the fix was. Any suggestions?

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it could be the tmobile network or something because last night (when i was on 2.2.1) i sent a slideshow of about 5 pics to a friend whom i usually send pics too and they never frickin went, even today they still never left my phone. usually i dont have a problem. so it cant be the version of the android, it's frickin tmobile being a butthole. lol

ANYWAY, i just finally downloaded the file to my phone, used ASTRO FILE to find the file, moved it to /sdcard (the file was on the card but in "download" for those looking for it). i moved it to /sdcard as i just said, then followed the instructions and everything is running fine. it took awhile to load back up after it updated and tells you to reboot, so be patient.

i remember people saying that "image file not found" messages. it'll say this but read every line. the last one tells you it found it and is updating, so look close before you cuss it out and get paranoid and shiet. lol do what you're told and it does indeed work.

just a note, but i actually didnt lose anything when i updated. maybe SOME apps, but not all, most were still on my phone and work, all my music, all my photos/videos and contacts are intact.

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The things that are on your SD card (e.g. music, photos, videos, ebooks, etc.) are not affected by the update. Contacts should resynch from Google or T-Mobile. The only things I lost when I had the update done in a T-Mobile store were apps I had installed. I had a list of those, so reinstalling them was easy. Glad your update went well.

I got the link from another site and the instructions were not too clear. Now I am afraid to move on. I think I might have named the file wrong, I added .zip to the end of the file name. I turn on the phone while holding vol down. Now I have a white screen with options of fastboot, recovery, factory reset, simlock, image crc. Can someone help because I now cant see my phone on computer to fix file name.

I have done this update. every thing works great on the phone. All except the camera. When the the camera loads it just loads a black screen. I have tried to reset the phone and restore. I have ran the update again. i still have the problem. Anyone have any ideas?

since updating, and it's been about a week now, i do definitely notice a huge improvement on the battery life. to the poster asking about renaming files and whatnot - FOLLOW THE DIRECTIONS. if you follow them, you do NOT need to rename any files.

question: i used titanium/visionary/etc to temproot my phone before this OS upgrade. i understand there's no way to temproot without going through a downgrading process, and that's fine. the only thing is.. i made some app backups with titanium. does this mean i can't restore all my app data unless i wait for a root solution?

Hopefully this will save someone a lot of time. If you get a message saying that there is no image or a bad image on the bootloader, you need to format your SD card to FAT32 and redownload the file. To format, right click on the drive under My Computer.